Copper Tube Information

Company dynamics

8mm dia brass tube

author:MF manufacturerstime:2022-03-10 22:45:12

author:Blue wrench

If the content here helps you,Please click!

A picture can really understand the knowledge of craft pipeline! 5Tube, 4Class fitting piece,Flange、Wasket and bolt,actually,Is it simple!

Content architecture

8mm dia brass tube

「text 」

Tube son

(8mm dia brass tube)Many tubes classification methods,Classification according to material can be divided into metal tubes、Non-metal tube and steel lining non-metallic composite tube。

(8mm dia brass tube)8mm dia brass tube

Non-metal pipe mainly has a rubber tube、plastic pipe、Asbestos cement tube、Graphite tube、Glass steel pipe, etc.,Non-metal tubes are smaller than the proportion of metal tubes,Metal tube accounted for more than 85% of all process pipe installation projects in most petrochemical devices。

(8mm dia brass tube)today,Give you a focus on metal pipes。

8mm dia brass tube

▲ Metal pipe classification

(8mm dia brass tube)1

Welded steel pipe

(8mm dia brass tube)Welded steel pipe,Stylit steel tube is also known,Generally, it is generally welded by a steel plate or steel strip.。

In the form of surface treatment of pipe:

(8mm dia brass tube)Divided into galvanized and non-galvanized。Surface galvanized white,Alike called a white iron or galvanized steel pipe;Surface is not galvanized, ordinary welded steel pipe,Black iron pipe。

Galvanized welded steel pipe,Commonly used for transport media requires more clean pipelines,Such as living water、Purifying air、Instrumental air, etc.;No zinc welded steel pipe,Can be used to deliver steam、gas、Compressed air and condensed water, etc.。

According to user requirements,Welding steel pipe can be divided into two:

One is the tube end with threaded,The other is that the tube is not threaded。Welding steel pipe with threaded tube,Each tube length is4~9m,Welding steel pipe without thread,Each tube length is4~12m。

(8mm dia brass tube)Welding steel pipe is different from the thickness of the wall:

Thin-walled steel pipe、Thickened steel pipe and ordinary steel pipe。The most used in the process pipe is the ordinary steel pipe.,Its test pressure is2.0MPa。Thickened steel pipe test pressure is3.0MPa。

(8mm dia brass tube)More coupled methods for welding steel pipes:

Threaded join、Flanges and welding。The flange connection is divided into threaded flanges and welding flanges.,Welding method is also divided into gas welding and arc welding。

Specifications for common welding steel pipes:

(8mm dia brass tube)Nominal diameter6~150mm


Seamless steel pipe

Seamless steel pipe,Is the maximum amount of industrial pipeline,Variety of pipelines。

8mm dia brass tube

Substantially divided into:

Fluid transport seamless steel pipe and two major categories of seamless steel pipe with specialty。The former is a steel pipe commonly used in craft pipelines,The latter is like a boiler special steel pipe、Cracking cooker and heat exchanger steel pipe, etc.。

According to the material:

Carbon seamless steel pipe、Chrome-molybdenum seamless steel pipe and stainless、Acid-resistant steel pipe。

(8mm dia brass tube)According to the nominal pressure can be divided into:

Low pressure(0≤1.0MPa)、Medium pressure(1.0<10MPa=、high pressure(≥10MPa)Three categories。

Process pipelines are commonly used in fluid delivery seamless steel pipes。


❶Carbon seamless steel pipe

Commonly used manufacturing materials10No、20No、16Mnsteel。

(8mm dia brass tube)The specification range is:Hot rolling outer diameterφ32~630mm,Cold extra outer diameterφ6~200mm,Single tube length4~12m,Allowing operating temperature-40~450℃。

Widely used to transport various types of steel non-corrosive,Severe steam、oxygen、Compressed air、Oil and oil, etc.。

❷Low alloy steel seamless steel pipe

(8mm dia brass tube)Series alloy steel pipes containing a certain proportion of alloy elements。

Usually divided into two kinds:

One is a low alloy steel tube containing manganese elements,Ordinary low alloy steel pipe,Such as16Mn、15MnVWait;The other is to contain chromium、Low alloy steel pipe for elements such as molybdenum,Willa steel pipe。

(8mm dia brass tube)Commonly used12CrMo、15CrMo、12Cr2Mo、1Cr5MoWait,The specification range is outside the outer diameterφ10~φ273mm,Single tube length4~12m,The temperature range of chromium-molybdenum steel pipe is-40~550℃。

Low alloy seamless steel pipe,Multi-use to transport various temperatures of oil、Salt water with strong oil and corrosive、Low concentration organic acid, etc.。

(8mm dia brass tube)❸ Stainless acid-resistant steel pipe

According to chrome、nickel、Different content of titanium various metals,A lot of varieties,haveCr13、00Cr17Ni14Mo2、1Cr18Ni12Mo2Ti、1Cr18Ni9TiWait。

(8mm dia brass tube)The most used in these steel numbers is1Cr18Ni9Ti,Simplified material documents in the construction drawing18-8To represent,Applicable temperature range-196~700℃。

Media for transporting a variety of corrosive media in chemical production,Nitric acid、Acetic acid and urea, etc.。

❹High pressure seamless steel pipe

Its manufacturing material is basically the same as the seamless steel tube described above,Just tube wall ratio medium low pressure seamless steel tube thickness,Thirtiest tube wall40mm。

Such as high pressure seamless steel pipe specifications for fertilizer equipmentφ14×4(mm)~273×40(mm),Single tube length4~12m,Applicable pressure range10~32MPa,Operating temperature-40~400℃。

Transfer raw material gas in the petrochemical device seamless steel pipe、Hydrogen、Syngas、water vapor、High pressure condensed water。

❺Low temperature steel pipe

More than the cold area of the introduction project,Its material grade isSTPL-39、STPL-46,Operating temperature-105℃。

Low temperature steel tubes are divided into seamless steel pipes and slit steel pipes.,Seamless low temperature steel pipe nominal diameter15~400mm,Wall thick carbon steel pipe;Sewing low-temperature steel pipe nominal diameter400~1100mm,Wall thickness6~10mm,Single tube standard length6m。

(8mm dia brass tube)Suitable for conveying various non-corrosive low temperature medium pipes,At present, there is no mass production and steel pipe corresponding to this standard.。


Steel roll tube

Steel roll tube,It is carried by the steel plate.,Two kinds of straight seam welding steel pipes and spiral welding steel pipes。

Sewing welding steel pipe:

  • Most of the construction site manufacturing or commissioning processing plant,Professional steel pipe factory does not produce。
  • Steel sheet materialQ235A、10No、20No、16Mn、20gWait,The specification range is a nominal diameter200~3000mm,Maximum4000mm,Wall thickness is generally4~16mm。
  • Nominal diameter200~900mmSingle tube length6.4m;Nominal diameter1000~3000mmFor4.8m。
  • Applicable working temperature:Q235Afor-15~300℃,10No、20No、16Mn、20gfor-40~450℃,All are suitable for low voltage range。

Spiral welding steel pipe:

  • Production by steel pipe manufacturing plant,MaterialQ235A,16Mn。
  • The specification range is a nominal diameter200~700mm,Wall thickness7~10mm,Single tube length8~18m。
  • Applicable working temperature:Q235Afor-15~300℃,16Mnfor-40~450℃,Operating pressure:Q235Afor2.5MPa,16Mnfor4MPa。

Straight seam welded steel pipe and spiral seam welded steel pipe,It is mostly used to transport medium with low corrosiveness at normal temperature and low pressure.,as low pressure steam、underground circulating water、Gas and oil, etc.。The spiral seam welded steel pipe has a long single pipe,Especially suitable for long distance pipelines。

According to project needs,and Straight seam stainless steel coil welded pipe,are rolled at the construction site,The factory does not produce。Most of the materials used are1Cr18Ni9Tisteel plate。The nominal diameter of its specification range is200~1000mm,Nominal diameter200~400mmThe wall thickness is4mm,Nominal diameter700~1000mmThe wall thickness is6~8mm,The length of a single tube is4.5m。The applicable temperature and the range of the medium conveyed are the same as those of the low-pressure stainless steel pipe。


copper pipe

Copper tubes are divided into two types: copper tubes and brass tubes:

  • The grades of materials used in the manufacture of copper pipes are:T2、T3、T4andTUPWait,higher copper content,Take up99.7%above;
  • The material grades of brass tubes areH62,H68Wait,alloy of zinc and copper,Such asH62brass tube,Its material composition is copper60.5%~63.5%,Zinc is39.6%,other impurities less than0.5%。
8mm dia brass tube

The manufacturing methods of copper pipes are divided into two types: drawing and extrusion.:

  • The outer diameter of the drawn copper tube isφ3~φ200mm,The outer diameter of the extruded copper tube isφ32~φ280mm,wall thickness1.5~5mm;
  • The specification range of copper coil welded copper pipe is the outer diameterφ155~φ505mm,There are two kinds of supply methods: single root and plate。

The applicable working temperature of copper pipe is250℃the following,Mostly used for oil pipelines、Insulation accompanying pipes and air separation oxygen pipes。


Titanium tube

Titanium tube is a new type of tube material in recent years,Due to its light weight、high strength、Strong corrosion resistance and low temperature resistance,Often used in process parts where other pipes are not competent。

Titanium tube is usedTA1、TA2Industrial pure titanium manufacturing,The applicable temperature range is-140~250℃,when the temperature exceeds250℃Time,Its mechanical properties decrease。

The specification range of commonly used titanium pipes is the nominal diameter20~400mm。Suitable for low and medium pressure,Low pressure pipe wall thickness2.8~12.7mm,Medium pressure pipe wall thickness3.7~21.4mm。

(8mm dia brass tube)Although titanium tube has many advantages,but expensive,Welding is difficult,not yet widely adopted。

(8mm dia brass tube)Tube piece

(8mm dia brass tube)Change direction in piping system、Pipe fittings are required for elevation or change of pipe diameter and branch pipes from the main pipe.。Due to the different shapes of the piping、Simple and complex,therefore,There are many types of pipe fittings。

Commonly used pipe fittings have elbows、Tee、Reducer、pipe joint、Caps etc.。

8mm dia brass tube

▲ Pipe fittings are classified by use



Elbow is used to change the direction of the pipe。

8mm dia brass tube

The bending angle of the commonly used elbow is90°、45°and180°,180°Elbow also known asUType elbow,Elbow with special angle is also available,but very few。

❶Malleable steel elbow

(8mm dia brass tube)Malleable steel elbow,Also called malleable iron elbow,is the most common threaded elbow。

The size of malleable steel elbow is relatively small,Commonly used specification ranges are1/2~4inch,According to its different surface treatment, it is divided into two types: galvanized and non-galvanized。

This malleable pipe fittings,Mainly used for heating,On water and gas pipes。during the process,Except for low-pressure pipes that need to be dismantled frequently,Rarely used on other material pipelines。

❷ pressed elbow

pressed elbow,Also known as stamped elbow or seamless elbow,high-quality carbon steel、Stainless acid-resistant steel and low-alloy steel seamless pipes, etc.,Compressed in a special mold。

  • Its bending radius is one and a half times the nominal diameter(R=1.5DN),In special occasions, elbows with a bending radius equal to the nominal diameter can also be used(R=1DN)。
  • Its specifications range fromDN20~600mmwithin。
  • Its wall thickness range is consistent with the table number of seamless steel pipe。
  • Pressed elbows are generally stamped from standard seamless steel pipes by professional manufacturers or processing plants.,Both ends of the elbow should be beveled when leaving the factory。

❸Stamped Welded Elbow

Stamped Welded Elbow,It is made of sheet metal stamped into half annular elbow by die.,Then the two half-ring elbows are assembled and welded to form。

Its bending radius is the same as that of seamless pipe elbows,Specification range is nominal diameter200mmabove。

❹Welding elbow

(8mm dia brass tube)Welding elbow,Also called Shrimp Loin or Shrimp Body Elbow。

There are two production methods:

  • One is to use steel plate blanking in the processing plant,Coiled and welded after cutting,Most of the matching used for steel coil pipe。
  • The other is to use pipe cutting,Formed by group butt welding,Its specifications are generally200mmabove。The operating temperature cannot be greater than200℃,Usually can be produced on the construction site。

❺ High pressure elbow

High pressure elbow,Forged from high quality carbon steel or low alloy steel。

According to the form of pipe connection,Both ends of the elbow are machined into threads or grooves,High precision machining,It is required that the thread of the pipe mouth and the thread of the flange mouth can be tightly matched and freely screwed in without loosening.。

suitable for pressure22.0、32.0MPaof petrochemical pipelines,The common specification range isDN6~200mm。



The tee is a pipe fitting connecting the main pipe and the branch pipe,Depending on the material of manufacture and use,divided into many。

Divide by specifications:

It can be divided into the same diameter tee and the different diameter tee,Equal diameter tee is also called equal diameter tee;

  • The same diameter tee means that the pipe diameter of the branch pipe is the same as that of the main pipe
  • Reducing tee means that the pipe diameter of the branch pipe is smaller than the pipe diameter of the main pipe,So it is also called unequal diameter tee,The amount of reducing three general purpose is more
(8mm dia brass tube)❶ Malleable Steel Tee

Manufacture material and specification range of malleable steel tee,Same as malleable elbow,Not much used in petrochemical process pipelines,Mainly used for indoor heating、Water and gas pipes。

❷ steel tee

20Before the 1970s,The development speed of my country's industrial production technology is relatively slow,Engineering technology in process piping is also relatively backward。

In the design of various medium and low pressure steel pipes,When pipes need to use tee fittings,It is usually solved by gouging the hole and taking over.,That is, on the supervisor that needs to take over the branch,First dig a hole according to the diameter of the branch pipe,Weld the branch pipe。This approach has many disadvantages,Welding quality is not easy to guarantee,Pipes are easily deformed after welding,Impurities can easily enter the main pipe。

late seventies,With metallurgy、Introduction of large-scale modern production equipment such as petrochemical industry,Promote the development of process pipeline engineering technology,Currently,my country has been able to produce medium and low pressure pipeline steel tee,A series of products have been formed,The seamless tee specification isDN20~600mm,Steel plate welded tee specifications areDN150~1500mm。

(8mm dia brass tube)The production of stereotyped tee,Made of high-quality pipes,After cutting、gouging,After heating, it is drawn with a mold,Remachined,Become a stereotyped finished tee。Medium and low pressure steel product tee,Welded during field installation。Three-way steel used by steel roll,Two cases,One is the steel sheet of the processing plant,Cavoing welding;The other is to mount the on-site excavation。

❸ High-pressure three-way

(8mm dia brass tube)High-pressure three-way,There are two commonly used,One is the welding high pressure three-way,One is the overall forging high pressure three-way。

Welding high pressure three-way,Use high quality high pressure steel pipe material,Manufacturing method is similar to excavation,The hole opened by the supervisor,To match the inner branch pipe diameter。Welding quality requirements are strict,Pre-warming is usually required,Heat treatment after welding。The specification range isDN16~200mm,pressure22MPa、32MPa。

Overall forging high pressure three-way,Generally, thread flange is connected。The specification range is a top numberSCH160、DN15~600mm,Table number plus“XXS”,Has rangeDN15~300mm。



The role of the absence is to make the pipeline,From the direction of fluid movement,Most of them become larger,Some of them become large,Such as the exterior pipe of the steam backup pipe and the water pipeline is made up of small。Reaximinal。

❶Ma Steel

Ma Steel,Both of them,One is the internal thread weighing tube also known as an outer joint;The other is a tube member that combines internal threads and external threads.,Sub-core,Although it is not called a west,But the role of the weighing tube。

❷Steel weapon

(8mm dia brass tube)Steel weapon,Divided into seamless and seamless,Seamless radiant tube pressing seamless steel pipe,Steel sheet for seamless,Washed welding,Also known as welding。

These two types of weigns have two specifications of concentric and eccentricity.。There is a straight side at the bottom of the eccentricity,The bottom of the pipe can be used as a horizontal plane during use.,Easy to discharge the material during the discharge。

Seamless solar terms rangeDN25~600mm,The specification of the seamless welding line isDN200~1500mm。

Steel weapon,Finished pipe fittings as a pipe,It was only since the 1970s.,Early craft pipeline,Most of them are produced on-site。The variation of the pipe diameter is that the tube end pumping strip welding,Direct processing into a weapon;

The pipe diameter changes are not directly fell directly to the tube end.。Summary welding production,Take more artificial,Welding,Welding quality is not easy to ensure,Currently,Craft pipelines with high welding quality have been prohibited from adopting such methods。

(8mm dia brass tube)4

Other fittings

❶ Ahead

Ahead,It is a plug for the control of the control。Commonly used tops have elliptical and flat cover。

Elliptical head is also called a cap,The specification range isDN25~600mm,Multi-use in medium and low voltage pipelines。

(8mm dia brass tube)Flat head,According to its installation location,One is a slightly larger than the outer diameter of the tube,External welding。

The other is that the cover head is slightly smaller than the inner diameter,Put the head plate into the tube welding。Common specifications rangeDN15~200mm,This head is mostly used on a lower pressure of the pressure.。

❷ Boss

Boss,Also known as a mouth,Is a self-control instrument specializing in the process of craft pipeline,Is installed by process pipelines,Therefore, the boss is also listed as a fitting member.。

Single-sided tube joints used in process pipes also belong,It is one end soldering on the supervisor,Alternative or install other components,Or additional tube,The specification range isDN15~200mm,High school low voltage pipelines。

(8mm dia brass tube)❸Blind board

Blind board,Its role is to cut the medium in the pipeline,According to the use of pressure and flange cover, the following is divided into the following:

  1. Slidender blind board,Use with smooth cover flange,Its applicable pressure range is1.0~2.5MPa。
  2. Convex blind board,Its own side of itself,Another side with concave surface,Use with the concave convex sealing surface flange。use pressure4.0MPa,SizeDN25~400mm。
  3. Ladder slot blind board,Working with ladder tank sheet flange,Use the pressure range6.4~16.0MPa。SizeDN25~300mm。
  4. “8”Literack,Also divided into a smooth surface,Three kinds of concave convex surfaces and trapezoidal grooves,Use pressure with the above three blind bilters,“8”The framing plate is different.,It combines two uses on a part,That is, the blind plate is connected to the gasket.。When packed in the flange,The gasket exposed outside is a visual sign that is cut off.。 “8”Various materials for the manufacturing materials of the character blind board,Select according to the temperature and pressure of the conveyor。General low voltage pipeline,Temperature does not exceed450℃Time,The material usedQ235A、20Steel and25Steel;Temperature450~550℃Time,The materials used are15CrMo、1Cr5Mo。Be in the pressure4.0~16.0MPa,Temperature is greater than550℃Time,Stainless steel。
(8mm dia brass tube)Law Orchid、pad piece and screw bolt

8mm dia brass tube



The flange is a part of a connection role in a process pipeline.。This application range is very wide range of applications,Such as pipelines and process equipment,Connection of flange valves and accessories on pipelines。Flanges are used in both installation and disassembly flexibility,Reliable sealing。

Craft pipeline delivered,various kinds,Temperature and pressure,Therefore, the intensity and seal of the flange,Different requirements。In order to meet the needs of craft pipe installation projects,There are many flanges that have different structures and stress。

The following is a brief introduction to various flanges.:

(8mm dia brass tube)❶ Welding method

(8mm dia brass tube)Welding steel flange,Is the most commonly used in medium and low pressure processes。

This flange is fixed in the form of a tube,Is the flange in the tube,Welding flangel port and outside,Flange fixed,Applicable nominal pressure does not exceed2.5MPa。

  • Welding flange for carbon steel pipe connection,General useQ235Aand20Steel plate manufacturing;
  • Welding flange on stainless acid-resistant steel pipe,Application of stainless acid-resistant steel plate manufacturing as tube material。

Welding steel flange,Generally, it is smooth,Working on the sealing surface with shallow trench。Water wire,Figure:

(8mm dia brass tube)8mm dia brass tube

▲ Welding steel flange

The specification of the flat welding steel flange is as follows:

  • Nominal pressurePN0.25、0.6MPaForDN10~2000mm;
  • PN1.0~2.5MPaForDN10~600mm。

❷ Welding ruland

Welding steel flange,Also known as high neck flange or Damaya。Its intensity is very difficult、Good sealing performance,There are a variety of forms of sealing surfaces,Applicable pressure range。

Smooth face,Its nominal pressure isPN2.5MPathe following,SizeDN10~2000mm,Nominal pressurePN2.5MPa,Specification rangeDN10~1000mm,Nominal pressurePN4.0MPa,Specification rangeDN10~600mm, Figure:

(8mm dia brass tube)8mm dia brass tube

▲ Smooth face to solder rule

(8mm dia brass tube)②

Concurred sealing surface,Since the concave convex sealing is strict,Affected pressure。Handling face,Must be a concave surface、The other is a convex surface。Commonly known nominal pressure rangePN1.6~4.0MPa,SizeDN10~600mm, Figure:

8mm dia brass tube

▲ Concluded cover pair of welding steel flange

Sliding clay,This flange sealing performance is good,Structure form similar to uneven sealing surface flange,It is also a pair of flanges that must be used.。Nominal pressure range isPN1.6~4.0MPa,SizeDN10~600mm;PN6.4~10MPa,Specification rangeDN10~400mm, Figure:

8mm dia brass tube

▲ Water trough facing soldering flange

Ladder trough pair of welding flange,This flange is often used in oil industrial pipelines,Have a large pressure,Commonly used nominal pressurePN6.4、10.0MPa,SizeDN10~400mm;PN16MPa,SizeDN10~300mm。 Figure:

8mm dia brass tube

▲ Trapezoidal slot face for welding steel flange

All of the above,Just difference according to the form of its sealing surface。

From the perspective of installation,Whether it is the form of welding ruland,Its connection method is the same,It is thus consumed,Materials and machinery,Basically, it is also consistent。But due to the different form of sealing surface,Flange's processing and manufacturing cost varicity,therefore,Inquiry(Previse)When you count, you should pay special attention to the price of the flange itself.。

❸ Songbo steel pipe flange

This flange is not directly welded to the pipe.,Instead, the tube is turned over or the welding rings are sealed contact surfaces.,Subweight flanges,More used in copper、Colored metals and stainless acid-resistant steel pipes such as aluminum and lead。

(8mm dia brass tube)The biggest advantage:It is because the flange can freely,Very convenient when the flange is bolted。

Welding ring loose steel pipe flange suitable for pressurePN0.6~2.50MPa,The specification range isDN10~600mm;pressurePN4.0MPa,Specification rangeDN10~300mm,Welding ring loose steel tube flange only applies low pressure,PN0.6~1.6MPa,SizeDN10~600mm。The tube flank is only available forPN06MPaBelow。

(8mm dia brass tube)Welding ring loose set flange as shown:

(8mm dia brass tube)8mm dia brass tube

▲ Welding ring loose steel pipe flange

❹ Thread flange

Thread flange,It is a flange connected with threaded flanges and tubes.,Two high pressure and low pressure。

(8mm dia brass tube)8mm dia brass tube(8mm dia brass tube)

8mm dia brass tube

8mm dia brass tube

▲ High pressure pipeline flange connection structure type

❺ Flange cover

Flange is a component used with flanges,It is the same as a closed effect as the head。Sealing surface has smooth and convex-concave,Its specifications and applicable pressure ranges are consistent with the matching flange。


Flange gasket

Leakage is the main form of the failure of the tube flange,It with sealing structure、Stiffness of connected parts、Seal performance、Many factors such as operation and installation。

The gasket is the main seal of the flange connection,Therefore, the proper use of the gasket is also the key to ensuring the flange connection.。

The flange gasket is based on the corrosiveness of the medium delivered by the pipe.、temperature、There are many types in the form of pressure and flange cover.。Pipe flange gasket with non-metal gasket,Semi-metal gasket and metal gasket。

❶ Rubber asbestos pad

Rubber cotton pad is the maximum amount of the flange connection、Can apply many media,Steam、gas、Air、brine、Acid and base, etc.。The thickness of the rubber stone cotton pad,Various major is not uniform,Usually used3mmthick。Nominal diameter is less than100mmFlange,The thickness of its gasket does not exceed2.5mm。

(8mm dia brass tube)Pressure of the gasket:Used in smooth sealing surface flange,No more than2.5MPa。

Two kinds of rubber asbestos are commonly used in refinery industries:

(8mm dia brass tube)❷ Rubber mat

Rubber mat,Washes made with rubber sheets,It has certain corrosion resistance,Commonly used for temperature60℃the following,Stress does not exceed1.0MPa,Transmit low pressure,Pipeline flange connection of acid and alkali。

(8mm dia brass tube)This feature of this gasket is the use of rubber elasticity.,Dacted better sealing effect,Therefore, it is also often used in the installation of cast iron flange valves.。

❸ Wrapped gasket

(8mm dia brass tube)Winding gasket is referred to as a winding pad,It is entangled with metal steel strips and non-metal fillers.。

advantage:This gasket has a simple manufacturing、Low price、Material can be fully utilized、Advantages with better sealing performance,Wide application on petrochemical process pipelines。

Applicable parameters:Applicable nominal pressure is4.0MPathe following,Applicable temperature range,08Steel temperature up to450℃,0Cr13Wrap pad made of steel belt,Using temperature up to540℃。The thickness of the gasket is generally4.5mm,Diameter is greater than1000mmTime,The thickness of the gasket is6~7mm。The thickness of the positioning ring is3mmabout。

Most of this gasket is used for smooth surface flanges,Its sealing surface does not use the car wire。Some winding pads,Also have a positioning ring,Is to prevent gaskets from deviation from the flange center。

Metal steel strip08Steel、0Cr13Steel and1Cr18Ni9TiSteel, etc.;Non-metallic strip quality、Flexible graphite、Polytetrafluoroethylene, etc.。

❹ Toothed mat

The tooth pad is made of various metal,Material has ordinary carbon steel、Low alloy steel and stainless acid resistant steel,Its thickness3~5mm。

It is in contact with the flanged sealing surface using the co-circular denseness of the concentric circle.、Multiple sealing,Therefore, the sealing performance is better,Commonly used in concave-convex sealing surface flanges。

Applicable parameters:The highest nominal pressure is up to16.0MPa,Suitable for parts with high operating temperature,Such as0Cr13Material tooth pad,Its applicable temperature can be reached530℃。

(8mm dia brass tube)❺ Metal gasket

Many types of metal gaskets,Divided by shape with metal flat pad,Cross-crossing is elliptical、Octagonal metal gasket and lens gasket。Low carbon steel according to manufactured materials、Stainless acid-resistant、Copper、Aluminum and lead, etc.。

The use of metal gaskets,That is, the hardness of the washer surface must be lower than the hardness of the flange cover.。

The selection of the gasket should be based on the temperature of the medium delivered by the pipe.、pressure、Corrosive and connection flanged sealing forms to determine。Professional stronger gasket,Mirror mat,Suitable for high pressure flanges。


Flange with bolts

(8mm dia brass tube)Bolts used to connect flanges,Two kinds of single-head bolts and double bolts,Its thread is generally a triangular metric coarse thread。

❶ Single-head bolt

Single head bolt also known as hexagon head bolts。Single-head bolts are divided into semi-intensive and refined,On the medium and low pressure process pipeline,Using the most used half-single bolts。

(8mm dia brass tube)Manufacturing a single-headed bolt common materialQ235A、35Steel and25Cr2MoVAWait。Commonly used for nominal pressure2.5MPaThe following flange connection。

Applicable temperature is based on bolt material,Such as35The bolt manufactured by steel can be reached350℃;25Cr2MoVASteel manufactured bolts、Applicable temperature570℃。

8mm dia brass tube

▲ Single head bolt picture

8mm dia brass tube

▲ Wait double head bolt map

❷ Double head bolt

8mm dia brass tube

Double bolts used on craft pipelines,Most of the other long double head refined bolts。Suitable flange connection with high temperature and pressure。

(8mm dia brass tube)Material35Steel,30CrMoA,35CrMoA,25Cr2MoVA,0Cr19Ni9、0Cr15Ni25Ti2MoAlVBand37SiMn2MoVAWait,Nominal pressure range is1.6~32.0MPa,Applicable temperature700℃。

❸ Nut

Nut,Hexagon。Squeezing half of hard and refined。According to the form of nut structure, it can also be divided intoAType andBTwo types。

(8mm dia brass tube)Semi-single single-headed boltANut;Refined double boltsBNut。Nuts and bolts to be used,However, the hardness of the nut manufacturing material cannot exceed the hardness of the bolt material.。

(8mm dia brass tube)8mm dia brass tube(8mm dia brass tube)

8mm dia brass tube(8mm dia brass tube)

▲ Hexagon nut

Look at it,Do you really don't want to pay attention?!

follow me,The same old sailor together in the mechanical ocean sailing——Seaman

Random recommendation